{
  "bibcode": "2014GCN.16313....1B",
  "body": "M. G. Bernardini, P. D'Avanzo, A. Melandri, S. Campana (INAF-OAB), P. A. Evans, K. L. Page (U. Leicester), \nE. Troja (NASA/GSFC/UMCP) report on behalf of the Swift-XRT team:\n\n\nWe have analysed 24.4 ks of XRT data for GRB 140516A (Bernardini et al. GCN Circ. 16285),  \nfrom 92 s to 397.8 ks after the  BAT trigger, in Photon Counting (PC) mode. \n\nThe X-ray counterpart reported by Bernardini et al. (GCN Circ. 16285) and Gompertz \net al. (GCN Circ. 16291) apparently disappeared in the data collected from t-t0=92.8 ks onwards. \nHowever, in the same dataset we find evidence for the presence of an unrelated source at \nthe position RA, Dec = 252.99269, +39.95659 which is equivalent to:\n\nRA (J2000): 16h 51m 58.25s\nDec (J2000): +39d 57' 23.7\"\n\nwith an uncertainty of 4.0 arcsec (radius, 90% confidence).\n\nThis position is 24\" away from the enhanced position for this burst reported by\nOsborne et al. (GCN Circ. 16289) while it is consistent with the source\n165158.53+395728.9 reported in the Krawczyk et al. (2013; ApJS, 206, 4) QSO\ncatalogue. \nWe therefore caution that this field source is likely contaminating the automated late-time \nX-ray light curve of GRB 140516A, given the spatial proximity to its transient \nX-ray counterpart.\n\n[GCN OPS NOTE(22may14): Per author's request, the word \"automated\" was added \nto the last sentence.]",
  "circularId": 16313,
  "createdOn": 1400715740000,
  "email": "paolo.davanzo@brera.inaf.it",
  "subject": "GRB 140516A: further Swift-XRT analysis",
  "submitter": "Paolo D'Avanzo at INAF-OAB  <paolo.davanzo@brera.inaf.it>",
  "eventId": "GRB 140516A"
}